Theoretically, with a twin GTX2863r setup, when would full boost be achieved on a N54?

@VargasTurboTech any comment on this? For those of us looking for a quicker spool and a little less power, will there be another set of turbos using the same flange? Or is it stage 2 or 3 and that's it?

@VargasTurboTech any comment on this? For those of us looking for a quicker spool and a little less power, will there be another set of turbos using the same flange? Or is it stage 2 or 3 and that's it?

It is hard to say exactly without testing. But Dzenno did some number crunching a while back and came up with 1700-2000 for 13-15 PSI I believe. This remains to be seen. The great thing about using the GT / GTX package is, I am going to offer multiple variations of the stage 3 all using the same package. So you want a middle of the road set up go with the GTX2863 they are claimed by garrett to support 425 each. You want quicker spool and less power go with the smaller GTX2860 400 each, or go with the biggest set up the GTX2867 they support 475 each. I will also be offering 3 options in the straight GT series with no billet wheel for a reduced price. So basically you will have 6 options and they all are exactly the same size package wise, just the internals change. Makes for a very flexible system, because not everyone has the same goals.

Last edited by Tony@VargasTurboTech; 09-26-2012 at 07:48 PM.
Reason: Edited for more accurate numbers

It is hard to say exactly without texting. But Dzenno did some number crunching a while back and came up with 1700-2000 for full boost I believe. This remains to be seen. The great thing about using the GT / GTX package is, I am going to offer multiple variations of the stage 3 all using the same package. So you want a middle of the road set up go with the GTX2863 they are claimed by garrett to support 425 each. You want quicker spool and less power go with the smaller GTX2860 400 each, or go with the biggest set up the GTX2867 they support 475 each. I will also be offering 3 options in the straight GT series with no billet wheel for a reduced price. So basically you will have 6 options and they all are exactly the same size package wise, just the internals change. Makes for a very flexible system, because not everyone has the same goals.

It is hard to say exactly without texting. But Dzenno did some number crunching a while back and came up with 1700-2000 for full boost I believe. This remains to be seen. The great thing about using the GT / GTX package is, I am going to offer multiple variations of the stage 3 all using the same package. So you want a middle of the road set up go with the GTX2863 they are claimed by garrett to support 425 each. You want quicker spool and less power go with the smaller GTX2860 400 each, or go with the biggest set up the GTX2867 they support 475 each. I will also be offering 3 options in the straight GT series with no billet wheel for a reduced price. So basically you will have 6 options and they all are exactly the same size package wise, just the internals change. Makes for a very flexible system, because not everyone has the same goals.

I would be happy with full boost by 4k lol, but I love the approach that you are taking with this. You definitely have a future customer if this comes to fruition.

There it is, that's what I remembered seeing. "13 PSI by 1500 RPM". Seriously sorry guys, that was some serious garbage I just threw out.

Don't worry. I am a mechanical engineer. Threw that number right out the window. Was complimenting you on having multiple options available in stage 3. I am aiming for something with 3,250-3,500 full boost without tricks so I suspect these will work.

If you want spool any earlier that that we'd probably need to do sequential turbo of sorts.

Haha. I honestly enjoy reading all this. It doesn't discourage me. At least people are passionate about the platform. I can assure everyone I am doing my best to make this happen, and honestly it looks completely feasible now that I have 2 cars and have seen the room we have. There will be some issues but nothing that cant be over come.

I dont suppose there is enough room on an xi car? I would imagine the axle would be in the way for anything but the stock turbo setup? Will the xi guys be stuck with a set of stage 2's due to the lack of room, or do you think it may be possible to squeeze in a set of Garretts?

Vishnu already has a single turbo kit on the market and HPF is supposedly finalizing theirs.

Yes but as it's been mentioned before, competition can be good for the consumer and helps drive innovation. Plus the way it "appears", Vargas has the ability to bring products to the community at a better cost.

Yes but as it's been mentioned before, competition can be good for the consumer and helps drive innovation. Plus the way it "appears", Vargas has the ability to bring products to the community at a better cost.

Well, you gotta be patient if you want a single from Vargas, because the majority wants twins. I'm just saying the people who want a single already have options whereas those who want twins don't.

Well, you gotta be patient if you want a single from Vargas, because the majority wants twins. I'm just saying the people who want a single already have options whereas those who want twins don't.

I can understand that. I'm actually not against either option. I'm looking forward to any option that will get me near to the performance I was use to.
I'm just playing devil's advocate with both. I would just hate for any option to be taken off the table.
From a cost standpoint though (for the consumer and vendor), it "appears" as if the single would be cheaper yet still offer amazing performance

From a tuning standpoint, it'll be easier to tune a single than twins unless VTT can keep the same design as oem. But I have no doubt that if someone makes a good set of twins that fit in the space provided, then COBB and others will figure out the tuning.